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E. KNAUSS. cAnunEE Fon GAsoLEuE ENGINES,

, APPLICATION FILED IAA-R. 20| IBI?.

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' Patented May 27,1919.

EDWARD KNAUSS, OF NEW YORK, N. Y.

CARBURETER FOR GASOLENE-ENGINES.

Specification of Letters Patent.

Patented May 27,' 1919.

Application filed March 20. 1917. Serial No. 156,054.

To all whom it may concern Be it known that 1, EDWARD KNAUss, a citizenof the United States, residing at New York city, in the county ofvNewYirk, and State of New York, have invented certain new and usefulimprovements in Carbureters for Gasolene-Engines; and 1 do herebydeclare the following to be a full, clear, and eXact description of theinvention, such as will enable others skilled in the artto which itappertains to make and use the same.

This invention relates to carbureters for gasolene and other hydrocarbonengines and has for its object to provide a device of this characterwhich will,be comparatively inexpensive to manufacture, simple inconstruction and more eflicient in action than those heretoforeproposed.

With these and other objects in view the invention consists in the noveldetails 4of construction and combinations of parts more fullyhereinafter disclosed and more particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of thisspecification in which like numerals designate like parts in all theviewsz Figure 1 is an elevational view of a carbureter made 1naccordance with this invention;

Fig. 2 is a central sectional View of a portion of the parts shown inFig. 1; I

` Fig. 3 is an enlarged partially sectional view of the'fuel regulatingmechanism; and

Fig. 4 is a detail sectional view taken on the line 4--4 of Fig. 1,looking in the direction of the arrows.

1 indicates any suitable outer casting or shell provided with the airintake 2 controlled by the air throttle 3, and having the passage 4connected with the intake of the engine. Fitted to the intake 2 inadvance of the throttle` 3 is the connection 5 provided with the valve6. Said connection is joined as at 7 with the pipe 8 adapted to slipinto and slip out of the rotating thumb piece 9, as indicated by theslipjoint 10, and the said thumb piece 9 is rigidly connected with the tube10 screw threaded as at 11 and provided with the air delivery end 12.

Surrounding said tube 10 is the tubular feed member 13 having thesubstantially cylindrical bore at its upper portion and the tapered boreor chamber 14 at or near its lower portion. Rigid with said feed tube 13is the piston 15 provided with the fuel inlets 16, and surrounding saidpiston 15 is the tubular member 17 screw threaded at its lowervend toaccommodate the plug 18 provided with the central screw threaded borethrough which the tube 10 passes and also provided with a stufmg box 20to prevent leakage past said tube 10. The upper end of said member 17 islikewise screw threaded as at 21v to accommodate the outer screwthreaded sleeve 22, and said upper end is likewise closed as by thediaphragm member 23 having the hollow extension 24 which accommodatesthe upper end of the tube 13.

Said tube 13 projects beyond the extension 24 and has rigidly securedthereto as at 25 the perforated diaphragm member 26 having the hollowupwardly projecting eXtension 27 and the inverted hood member 28 formingthe chamber 29 and the narrow passage 30 into which projects the upperend of said extension 27. Rigid with said member 28 and constituting anextension thereof is the flaring mouth like member 31. Between thediaphragm member 23 and the upper surface of the piston 15 is the spring33 adapted to hold said piston against the plug member 18, as shown,.butpermitting said piston and its associated parts to be lifted against thecompression of said spring.

35 represents a pipe leading to the gasolene tank 36 or other source offuel supply, and itis conveniently joined to the connection 37 by themember 38', and delivers into the chamber 39, controlled by the checkvalve 40 associated with the spring 41, said check valve being locatedbetween the chamber 39 and the chamber 42, with which the saidconnection 37 is also provided. Said chamber 42 opens into the nipple 40of the tubular member 17 as shown, and the width or height of the piston15 is so chosen as to almost but not quite block the deliver of the fuelfrom the said chamber 42. aid piston'very loosely fits the tubularmember 17 so that gasolene or other fuel may readily leak past saidpiston and occupy the space in said member 17 both above and below saidpiston 15. The outer tubular member 22 is rovided with a plurality ofdepressions or holes 45 as best shown in Figs. 2 and 4,'and

ing arestricted passage 54 between said member 53 and said member 31. 55represents any suitable means rigid with the stem 56 of the air throttlev3 by which the said throttle may be operated, and 57 a means connectingthe said member 55 with the control mechanism. 60 represents anysuitable lever or other means for operating the valve 6, and 61 anysuitable connection between said member 60 and the dashboard of avehicle. 62 represents any suitable connection between the member (i0and the rotatable .thumb piece 9 by which when the said member 60 is'turned the said' thumb piece 9 and tube 10 will also 'be turned.

The operation of this -carbureter will .be clear from the foregoing butmay be briefly summarized as follows Ordinarily the valve -6 will not bedisturbed and air will be sucked through said valve as well as past thethrottle 3 which is not. entirely closed. The air passing the valve 6will be sucked out of the end 12 of the tube 10, will draw fuel from thechamber 14 and mix therewith as it reaches the member 31, where themixture encounters the air that has been sucked past the almost closedvair throttle 3. The parts are so adjusted that the mixture thus producedwill be suitable for explosive purposes in starting the engine underordinary conditions. In cold weather, however, a mixture somewhat richerin fuelis desired, and to obtain it, the valve 6 is partially closed'as'by turning the lever 60, thus -reducing the quantity of air, and at thesame tlme turning the thumb piece 9 through -the connection 62,andthereupon turning the tube 10 and screw threads 11.to lower the end12 and admit more fuel past the said end 12. The

screw threads 11 are so pitched'as to cause 'the end 12 of the tube 10to descend in the tapered chamber 14 the right distance to cause ,thedesired quantity of fuel to be sucked into the passage 4. As the engineis started upon further opening the air throttle:

3 additional air may be sucked past said air throttle through theperforations 65 of the diaphragm 26 Vand lnto the chamber 29 whence saidair will travel through the passage 30 and into the flared member 31whereupon it will likewise become mixed with any fuel which may besucked from the tapered space or chamber 14 up through the pipe 13 andvinto said flared mem-ber 31. In adjusting the parts in the first place,the

-upper end 12 of the tube 10 is adjusted by means of the thumb piece 9after the plug 18 is screwed home to permit just the right quantity offuel,to be sucked into the passage through the wide open valve 6 forstarting the engine under ordinary conditions, and to give the propermixture when the air throttle' is still further opened for running.

, In addition to this, it is necessary Lo pro vide for the properleakage of air from the air throttle between the outer rim of thediaphragm 26 and the restricted rim 50. To secure this last namedadjustn'ient the member 17 is screwed up into the member 22 by 'means ofthe threads 21 until the diaphragm and rim will occupy the properrelative positions when said member 22 is thrust home and held inposition by the detents 19,

The parts being in their properly adjusted positions. when the airthrottle 3 is opened sufficiently wide the pressure 1f the air on theunder side of the diaphragm 26 will cause said diaphragm together Witathe tube 13 and piston 15 to be lifted against the compression of thespring 33 whereupon the tapered portion 14 ofthe tube 13 will widen outaround the upper end 12 of the tube l10 and thus permit a largerquantity of fuel to pass into the tube 13 and to become mixed in theflared portion 31 in the passage 1 above said member 31 with the airthere present. It will be observed that owing to the shape .of thecurved surface of the member- 53 and to the shape of the iared member31, after the said flared mem-ber 31 lifts through the annular passage54, said annular passage gradually widens so as to' ings, so that thissaid fuel will pass down around said piston 15 and be caught in thechamber 72 al ove the plug 18. On the other hand, when the air throttle3 is partially closed and the air pressure on the diaphragm 26 thusrelieved the said spring 33 lwill force said piston 15 down to itsposition shown in Fig. 2, whereupon the fuel in the space 72 will pass uaround said piston and occupy the space a ove thesame all as will beclear from the drawings.

The check valve 40 being controlledA by the spring 41 the fuel tank 36may be placed as much belov7 or as much above the upper end 12 of thetube 10 as may be desired. That is to say, if it is desired to place thesaid fuel tank 36 at a lower level than the upper end of said tube 10 orin the position illustrated in Fig. 1, then the spring 41 1s adjusted bymeans of the adjustable nut 7 5 so that a suction exerted in the passage4 by the engine will be sufficient to lift said valve 40 to permit thefuel to be sucked into the tapered space 14 as indicated.

On the other hand, if a Gravity feed is employed then the member I5 willalso be adjusted into such a position as will permit the said fuel to beproperly fed when subjected to the combined action of gravity and to thesuction above mentioned. It thus results that this carbureter may berunuon a gravity feed ,or on a pure vacuum feed as desired. As a matterof fact it does not depend upon its position or upon gravity for itsaction at all, but it may be placed on the engine in any suitable andconvenient position, land still operate perfectly.

This is an important feature of this invention because it does awayentirely with the necessity of employing a float controlled constantlevel reservoir which is now customary.

In other words, actual practice has proved that notwithstanding thedifferences in levels of the fuel, in the tank 36, both when gravityaids the suction and when suction alone accomplishes the feeding, yetowing to the valve 40 and`= the adjustable spring 41 the feeding of thefuel is thoroughly regulated and perfectly satisfactory.

An important feature of this invention resides in the fact that themembers 9, 10, 13, 15, 17, 22, 26, and 31 after having been properlyadjusted as above disclosed may be readily attached to and detached fromthe carbureter proper. 'Ihatis to say, as is well known automobileowners are greatlyboth-4 ered by having their cars stolen and also byhaving their own or other chauffeurs using the machines at unauthorizedtimes. As is also well known various locks andl other devices have beenproposed to prevent these annoyances but in almost every case theunauthorized use of the machine is had in spite of all that can be done.

With this carbureter, however, it is a comparatively simple matter todisconnect the tube 8 at the slip joint 10 to disconnect the connection37 from the nipple 40\bv unscrewing the connection 38, to slip the thumbpiece 9 out of the collar 62 and to snap out the detents 49 so that thetube 17 the plug 18, the tube 10 and the diaphragm 26 together withtheir'associated parts are readily withdrawn from the carbureter properwhile still in their operative adjusted positions, and to thus disablethe car. Not only is the car so thoroughly disabled by this simplewithdrawal of the parts mentioned that it cannot possibly be operated,but the parts withdrawn are so small that they can be readilyy carriedin the pocket; and as the adjustment of the parts are not in the leastdisturbed it is only a matter of a few seconds to reattach said parts tothe carbureter and thus have the car again in condition for operation.

It therefore follows that the owner of a car is at all times by thisinvention enabled to so fix his car that it can not be used without hisauthority.

It is obvious that those skilled in the art may vary the details of theconstruction as well as the arrangement of parts without departing fromthe spirit of the invention and therefore I do not wish to be limited tothe above disclosure` except as may be required by the claims.

What I claim is z- 1. In a carbureter the combination of a casingprovided with an air inlet. `and an outlet adapted to be connected tothe intake of the engine; an air throttle governing said inlet; aperforated diaphragm governing said outlet; a tubular air connectionfrom said inlet to and through said diaphragm; adjustable fuelcontrolling means for permitting fuel in predetermined quantities' topass into said tubular connection and connections permitting said fuelcontrolling means to -be readily attached to and detachedfrom saidcasing in its adjusted position, substantially as described.

2. In a carbureter the combination of a casing provided with an airinlet and an outlet adapted to be connected tothe intake of the engine;an air throttle governing said inlet; a perforated diaphragm governingsaid outlet; a tubular air connection in advance of said throttle fromsaid linlet to and through said diaphragm; a valve controlling saidtubular connection; adjustable fuel controlling means comprising atapered chamber and a movable choking tube in said chamber forpermitting fuel in predeter-` mined quantities to pass into said tubularconnection, and connections permitting said fuel controlling means to bereadily attached to and detached from said casing in its adjustedposition, substantially as described.

3. In a carbureter the combination 4of an.

outlet adapted to be connected with'the intake of an engine; aperforated movable diaphragrn controlling said outlet; an inter- .nallytapered tube connected with said diaphragm and movable therewith; apiston adapted to cushion the movements of said tube and movabletherewith; an adjustable feed controlling tube inside said first namedtube adapted tov feed air to the latter; an air throttle adapted toadmit sufficient air to said diaphragm to lift said piston liao andfirst named tube and thereby increase the quantity yof fuel passing vtotlie latter, and connections 'permitting said fuel controlling means tobe readily attached to and Vdetached from said .casing in its adjustedposition, substantially as described.

4. In a carbureter the combination of an outlet adapted to be connectedwith the in take of an engine; a perforated movable diaphragmcontrolling -said outlet; an internally tapered. tube connected withsaid diaphragm and movable therewith; a fuel slipply; means connectingsaid supply with said tapered' tube; a valve controlling said means;

a'piston adapted to cushion the movements of said tube and movabletherewith; an ad- .justable fuel controlling means inside said firstnamed tube adapted to feed air to the latter an air throttle adapted toadmit sufiicient air to said diaphragm to lift said piston and firstnamed tube and thereby in- 5. 'In a carbureter forv automobile cars thecombination of a tapered fuel feed tube; a fuel feed regulating meansinside said tapered tube; means for adjusting said regulating means; andmeans for readily attaching to and detaching from the carbureter casingsaid tube and regulating means in their adjusted positions, whereby thecarbureter is rendered operative or inoperative, at, pleasure,substantially as described.

6. In a carbureter the coinbinati on of a casing provided with an airinlet' andan outlet adapted to be connected to the intalfe` of theengine; an air throttle governing said inlet; a perforated v diaphragmgoverning said outlet; a tubular air connection from said inlet to andthrough said diaphragm:

adjustable fuel controlling means for permitting fuel y in predeterminedquantities to pass into said tubular connection; a valve controllingsaid tubular air connection; and means connected with said'valve adaptedto move said adjustable feed controlling means, substantially asdescribed.

In testimony whereof I affix my signature.

' EDWARD KNAUSS.

